Exam-style question
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A car of mass 1200 kg is moving with a speed of 15 m/s. What is its kinetic energy?.
- A.135000 J
- B.9000 J
- C.27000 J
- D.180000 J
Model answer
What a good answer should say
- 135000 J.
- the correct option
Explanation
Why this works
The correct answer is 135000 J. This supports Use kinetic energy and gravitational potential energy equations.
in Work, energy and power because it uses the required mechanics relationship directly. The other options are less suitable because they confuse a different force, motion, energy, momentum, or materials concept.
Common mistake
No common mistake is linked to this question yet.